Question

18/Social life A question posted on the gamefaqs.com website asked visitors to the site, "Do you have an active social life out- side the Internet?" 22% of the 55,581 respondents said "No" or "Not really, most of my personal contact is online." Galup At its w t is website (www.gallup.com), the Gallup Poll pub s results of a new survey each day. Scroll down to the end, u iI find a statement that includes words such as these: and on telephone interviews with 1016 national 8 and older, conducted March 7-10, 2014.. In addition to sampling error, question wording and practical into the findings of public opinion polls. a) For this survey, identify the population of interest. b) Gallup performs its surveys by phoning numbers generated lties in conducting surveys can introduce error or bias at random by a computer program. What is the sampling frame? c) What problems, if any, would you be concerned about in matching the sampling frame with the population? In Exercises 17 to 23, for the reports about statistical studies identify the following items (if possible). If you can't tell, then say so-this often happens when we read about a survey b) The population parameter of interest c) The sampling frame d) The sample e) The sampling method, including whether or not randomiza- tion was employed f) Who (if anyone) was left out of the study g) Any potential sources of bias you can detect and any problems you see in generalizing to the population of interest

Answer 1

a) Social Life: A question posted on the gamefaqs.com website asked visitors to the site, "Do you have an active social life out-side the internet?" Thus here the population of interest is all those public who may visit to the site b) Gallup performs its surveys by phoning numbers generated at random by a computer program. What is the sampling frame? Ans. Since it is random process, so any one with an active telephone is in the sampling trame c) What problems, if any, would you be concerned about in matching the sampling frame with the population? Ans. It may be possible that some people may not be having a phone and thus they may not be the part of the sampling. So it is a matter of concern 18) The population: The entire people or objects about which we are going to make some statement or hypothesis is called population. Here the population consist of any body who may be a visitor to the site Population parameter of interest: It is the percent of the visitors who replied "NO" that is "Not really my personal contact is online". The sampling frame: It consists of the visitor to the site The sample: The sample consists of (the visitors) 55,581 respondents The sampling method: This sampling can be called a convenience sampling method, as no efforts have been made to reach to the entire population, and also no randomization done. It depends on the convenience of the visitor who responds Who was left out of the study? All those who have not visited the site, or after visiting also didn't feel to respond were left out of the study